Columbia added internal fire fighting tanks to its fleet of CH-47D Chinook helicopters this season, and N471CH has now fought its first fire in Minnesota! Working in the land of 10,000 lakes, the Chinook and crew fought a 100 acre fire and was able to extinguish it in just a single fuel cycle! The crew was able to fill the tank an astonishing 21 times during the cycle. The Forest Service representatives are apparently very pleased with the results.